Do i really have to work in 1024*768 resolutin?

Ok so i made my pixel art in a canvas 50*50, and i saved it. After that i wanted to post it to DeviantArt, but it was too small of course becouse it was 50*50 pixels, my concern is do i really need to set my canvas to 1024*768 resolution to make it big enough, or i can make 50*50 just biggger. Please somebody HELP MEE.